High-temperature-resistant environment-friendly energy-saving agent suitable for steam boiler and preparation method thereof

Abstract

The invention discloses a high-temperature-resistant environment-friendly energy-saving agent suitable for a steam boiler and a preparation method of the high-temperature-resistant environment-friendly energy-saving agent. The high-temperature-resistant environment-friendly energy-saving agent for the steam boiler, which is prepared by compounding nine components including a high-temperature sodium polymaleate homopolymer, single alkylol amine, diethyl hydroxylamine and the like, is adopted for the first time; the energy-saving agent has good scale inhibition and dispersion effects on silicon scale in boiler water, and does not cause secondary pollution to a boiler system; according to the present invention, the energy saving agent and deoxidant integrated formula is provided, such that the energy utilization efficiency is high, the corrosion prevention effect is considered, the addition process is simplified, the purchase cost is reduced, the operation cost is reduced, and the synergistic effect is provided.

Description

Technical Field

[0001] This invention relates to the field of chemical energy-saving agents for boiler water systems, and more specifically to a high-temperature resistant, environmentally friendly energy-saving agent suitable for steam boilers and its preparation method. Background Technology

[0002] Against the backdrop of continuous global industrialization, energy demand continues to grow. Boilers, as one of the main energy-consuming equipment in industrial production and heating, consume a large amount of energy. Taking coal-fired power plants as an example, coal-fired boilers are key equipment in the power generation process, and the consumption of coal is enormous. As reserves of traditional energy sources such as coal gradually decrease, the pressure on energy supply is becoming increasingly prominent.

[0003] However, during long-term operation, calcium and magnesium ions in the water can easily form scale on the inner wall of the boiler. Scale has poor thermal conductivity, which hinders heat transfer, reduces boiler thermal efficiency, and increases energy consumption. At the same time, scale may also threaten the safe operation of the boiler. In addition, some companies' boiler equipment is aging, resulting in a decline in overall performance and increased energy consumption. However, replacing it with brand new high-efficiency boiler equipment is costly, which is difficult for some small and medium-sized enterprises to afford.

[0004] Using boiler energy-saving agents is a relatively economical and effective energy-saving method. It does not require large-scale upgrading and transformation of boiler equipment. Simply adding an appropriate amount of energy-saving agent to the water can potentially improve the energy utilization efficiency of the boiler and reduce operating costs to a certain extent. Therefore, given that improving the energy utilization efficiency of boilers and reducing energy consumption are urgent problems to be solved, the research and development of boiler energy-saving agents is imperative. Summary of the Invention

[0005] In view of this, the present invention provides a high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers and its preparation method, aiming to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers, comprising the following raw materials by weight percentage: High-temperature polysodium maleate homopolymer: 10-30%; Monoolamines: 5-20%; Diethylhydroxylamine: 5-10%; Morpholine: 1-5%; Acetaldehyde oxime: 5-15%; Acetone oxime: 1-10% Diethylaminoethanol: 10-20% Potassium hydroxide: 1-5% Isothiazolinone: 1-3% Water: Balance.

[0007] In some embodiments, the high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers comprises the following raw materials by weight percentage: High-temperature polysodium maleate homopolymer: 25%; Monoolamine: 15%; Diethylhydroxylamine: 8%; Morpholine: 5%; Acetaldehyde oxime: 10% Acetone oxime: 6% Diethylaminoethanol: 18% Potassium hydroxide: 3% Isothiazolinone: 2% Water: Balance.

[0008] In some embodiments, the high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers comprises the following raw materials by weight percentage: High-temperature polysodium maleate homopolymer: 20%; Monoolamine: 15%; Diethylhydroxylamine: 10%; Morpholine: 5%; Acetaldehyde oxime: 4% Acetone oxime: 7% Diethylaminoethanol: 16% Potassium hydroxide: 5% Isothiazolinone: 2% Water: Balance.

[0009] In some embodiments, the high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers comprises the following raw materials by weight percentage: High-temperature polysodium maleate homopolymer: 25%; Monoolamine: 15%; Diethylhydroxylamine: 10%; Morpholine: 4%; Acetaldehyde oxime: 3% Acetone oxime: 3% Diethylaminoethanol: 10% Potassium hydroxide: 3% Isothiazolinone: 2% Water: Balance.

[0010] In some embodiments, the high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers comprises the following raw materials by weight percentage: High-temperature polysodium maleate homopolymer: 25%; Monoolamine: 15%; Diethylhydroxylamine: 15%; Morpholine: 3%; Acetaldehyde oxime: 6% Acetone oxime: 18% Diethylaminoethanol: 12% Potassium hydroxide: 3% Isothiazolinone: 2% Water: Balance.

[0011] In some embodiments, the high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers comprises the following raw materials by weight percentage: High-temperature polysodium maleate homopolymer: 20%; Monoolamine: 10%; Diethylhydroxylamine: 15%; Morpholine: 2%; Acetaldehyde oxime: 2% Acetone oxime: 3% Diethylaminoethanol: 1% Potassium hydroxide: 3% Isothiazolinone: 2% Water: Balance.

[0012] In some embodiments, the high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers comprises the following raw materials by weight percentage: High-temperature polysodium maleate homopolymer: 20%; Monoolamine: 12%; Diethylhydroxylamine: 19%; Morpholine: 3%; Acetaldehyde oxime: 8% Acetone oxime: 7% Diethylaminoethanol: 13% Potassium hydroxide: 2% Isothiazolinone: 2% Water: Balance.

[0013] This invention provides a method for preparing a high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers, comprising the following steps: S1. Under normal temperature and pressure conditions and with stirring, a single alcohol amine, diethylhydroxylamine, morpholine, and acetaldehyde oxime are added in proportion to prepare a raw material mixture; S2. Add acetone oxime, diethylaminoethanol, potassium hydroxide, and isothiazolinone to the raw material mixture obtained in step S1 to obtain a mixed raw material. S3. Stir the mixed raw materials obtained in step S2 for 25 to 35 minutes, and then cool to room temperature to obtain a high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers.

[0014] In some embodiments, in step S1, the stirring speed is 100-200 r / min.

[0015] In some embodiments, in step S3, the stirring speed is 200-300 r / min.

[0016] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers and its preparation method, which has the following beneficial effects: 1. This invention is the first to use a high-temperature resistant, environmentally friendly, and energy-saving agent for steam boilers, which is a compound of nine components including high-temperature polysodium maleate homopolymer, single alcohol amine, and diethyl hydroxylamine. This energy-saving agent has a good effect on inhibiting and dispersing silica scale in boiler water and will not cause secondary pollution to the boiler system.

[0017] 2. The high-temperature resistant, environmentally friendly, and energy-saving agent of this invention, suitable for steam boilers, ensures that all steam and water indicators of the boiler meet the requirements of the national standard GB / T 12145-2016 "Water and Steam Quality of Thermal Power Generating Units and Steam Power Equipment," with optimized water and steam indicators. It possesses excellent scale inhibition effects, adsorbing and dispersing scale-forming ions such as calcium and magnesium in the water to prevent scale formation. It also cleans existing salt deposits and rust online. Optimizing various water and steam indicators, it forms a stable and reliable parallel organic molecular film on both sides of the steam and liquid, improving the system's corrosion resistance. It reduces boiler blowdown, lowering boiler water loss to below 1%. It removes old scale, has bactericidal functions, and features low dosage and low cost; generally, 0.5-10 ppm is sufficient to achieve good scale inhibition and dispersion effects.

[0018] 3. The formula of this invention includes an oxygen scavenger. Dissolved oxygen in water is one of the main factors causing corrosion of boiler metal. Oxygen reacts electrochemically with the metal surface of the boiler to form corrosion products such as rust. Adding an oxygen scavenger can chemically react with dissolved oxygen in the water and consume it, thereby reducing the dissolved oxygen content in the water, reducing the corrosive effect of oxygen on the metal, effectively removing dissolved oxygen in the water, and protecting the boiler metal.

[0019] 4. This invention is an integrated formula of energy-saving agent and oxygen scavenger, which has the dual effects of high energy utilization efficiency and corrosion prevention, and simplifies the addition process, reduces procurement costs, reduces operating costs, and has the advantage of synergistic effect. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1: This embodiment of the invention provides a high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers, comprising the following raw materials by weight percentage: High-temperature polysodium maleate homopolymer 20% 15% of monoolamines Diethylhydroxylamine 10% Morpholine 5% Acetaldehyde oxime 4% Acetone oxime 7% Diethylaminoethanol 16% 5% potassium hydroxide Isothiazolinone 2% Water balance.

[0022] A method for preparing a high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers includes the following steps: S1. Under the conditions of water as solvent, ambient temperature and pressure, and stirring speed of 100-200 r / min, add monoalkanolamine, diethylhydroxylamine, morpholine and acetaldehyde oxime in proportion to prepare raw material mixture; S2. Add acetone oxime, diethylaminoethanol, potassium hydroxide, and isothiazolinone to the raw material mixture obtained in step S1 to obtain a mixed raw material. S3. Increase the rotation speed of the mixed raw materials obtained in step S2 to 200-300 r / min and stir for 25-35 minutes. Cool to room temperature to obtain a high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers.

[0023] Example 2: This embodiment of the invention provides a high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers, comprising the following raw materials by weight percentage: High-temperature polysodium maleate homopolymer: 25%; Monoolamine: 15%; Diethylhydroxylamine: 10%; Morpholine: 4%; Acetaldehyde oxime: 3% Acetone oxime: 3% Diethylaminoethanol: 10% Potassium hydroxide: 3% Isothiazolinone: 2% Water: Balance.

[0024] The preparation method of the high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers is the same as in Example 1.

[0025] Example 3: This embodiment of the invention provides a high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers, comprising the following raw materials by weight percentage: High-temperature polysodium maleate homopolymer: 25%; Monoolamine: 15%; Diethylhydroxylamine: 15%; Morpholine: 3%; Acetaldehyde oxime: 6% Acetone oxime: 18% Diethylaminoethanol: 12% Potassium hydroxide: 3% Isothiazolinone: 2% Water: Balance.

[0026] The preparation method of the high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers is the same as in Example 1.

[0027] Example 4: This embodiment of the invention provides a high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers, comprising the following raw materials by weight percentage: High-temperature polysodium maleate homopolymer: 20%; Monoolamine: 10%; Diethylhydroxylamine: 15%; Morpholine: 2%; Acetaldehyde oxime: 2% Acetone oxime: 3% Diethylaminoethanol: 1% Potassium hydroxide: 3% Isothiazolinone: 2% Water: Balance.

[0028] The preparation method of the high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers is the same as in Example 1.

[0029] Example 5: This embodiment of the invention provides a high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers, comprising the following raw materials by weight percentage: High-temperature polysodium maleate homopolymer: 20%; Monoolamine: 12%; Diethylhydroxylamine: 19%; Morpholine: 3%; Acetaldehyde oxime: 8% Acetone oxime: 7% Diethylaminoethanol: 13% Potassium hydroxide: 2% Isothiazolinone: 2% Water: Balance.

[0030] The preparation method of the high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers is the same as in Example 1.

[0031] Example 6: This embodiment of the invention provides a high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers, comprising the following raw materials by weight percentage: High-temperature polysodium maleate homopolymer: 20%; Monoolamine: 12%; Diethylhydroxylamine: 15%; Morpholine: 1%; Acetaldehyde oxime: 2% Acetone oxime: 2% Diethylaminoethanol: 1% Potassium hydroxide: 3% Isothiazolinone: 2% Water: Balance.

[0032] The preparation method of the high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers is the same as in Example 1.

[0033] Comparative Example 1: A boiler energy-saving agent is provided, comprising the following raw materials by weight percentage: High-temperature polysodium maleate homopolymer 20% 15% of monoolamines Diethylhydroxylamine 10% Morpholine 2% Acetaldehyde oxime 3% Acetone oxime 7% 10% diethylaminoethanol 1% potassium hydroxide Isothiazolinone 2% Water balance.

[0034] The preparation method of the boiler energy-saving agent is the same as in Example 1.

[0035] Comparative Example 2: A scale inhibitor / dispersant is provided, comprising the following raw materials in weight percentages: 25% high-temperature polysodium maleate homopolymer 10% of monoolamines Diethylhydroxylamine 12% Morpholine 3% Acetaldehyde oxime 10% 3% acetone oxime 10% diethylaminoethanol 3% potassium hydroxide Isothiazolinone: 2% Water balance.

[0036] The preparation method of the scale inhibitor and dispersant is the same as in Example 1.

[0037] Comparative Example 3: A scale inhibitor / dispersant is provided, comprising the following raw materials in weight percentages: 25% high-temperature polysodium maleate homopolymer 15% of monoolamines Diethylhydroxylamine 15% Morpholine 3% Acetaldehyde oxime 6% Acetone oxime 14% 10% diethylaminoethanol 3% potassium hydroxide Isothiazolinone: 3% Water balance.

[0038] The preparation method of the scale inhibitor and dispersant is the same as in Example 1.

[0039] Experimental Example 1: Experimental Method: Performance Testing of Scale Inhibitors The scale inhibition rate, corrosion inhibition rate, and corrosion rate tests were conducted in accordance with the People's Republic of China Chemical Industry Standard HG / T 3929-2007, "Evaluation Method for Performance of Boiler Water Treatment Agents, Dynamic Method".

[0040] 1. Preparation of water for scale inhibition performance test 1.1 Initial water preparation: Weigh 100g of anhydrous calcium chloride and 36g of anhydrous magnesium sulfate, dissolve them in 3L of water, stir until dissolved, transfer to the water supply tank, and dilute with water to 180L; Separately weigh 66g of sodium bicarbonate, dissolve it evenly in 3L of water, transfer it to the water supply tank, stir until dissolved, and dilute with water to 200L.

[0041] 1.2. Prepare supplementary water: Prepare water with a total hardness of 6 mmol / L (3 / 4 Ca2+ + 1 / 4 Mg2+) and an alkalinity of 4 mmol / L (HCO3).

[0042] 2. Preparation of water for corrosion inhibition performance test 2.1 Initial water preparation: Weigh 33.3g of anhydrous calcium chloride, 12g of anhydrous magnesium sulfate, and 117g of sodium chloride, dissolve them in 3L of water, stir until dissolved, transfer to the water supply tank, and dilute with water to 180L; Separately weigh 33.6g of sodium bicarbonate, dissolve it evenly in 3L of water, transfer it to the water supply tank, stir until dissolved, and dilute with water to 200L.

[0043] 2.2. Add water to the solution: according to the total hardness (3 / 4 Ca2++ 1 / 4 Mg) 2 Prepared with 2 mmol / L of HCO3+, 2 mmol / L of alkalinity (HCO3), and 10 mmol / L of chloride ions (Cl-).

[0044] 3. Scale and corrosion inhibition performance test: Preparation of water supply 3.1 Initial water preparation: Weigh 100g of anhydrous calcium chloride, 36g of anhydrous magnesium sulfate, and 117g of sodium chloride, dissolve them in 3L of water, stir until dissolved, transfer to the water supply tank, and dilute with water to 180L; Separately weigh 33.6g of sodium bicarbonate, dissolve it evenly in 3L of deionized water, transfer it to the water supply tank, stir until dissolved, and dilute with water to 200L.

[0045] 3.2. Prepare supplementary water: Prepare water with total hardness (3 / 4Ca2++1 / 4Mg2+) 6 mmol / L, alkalinity (HCOJ) 2 mmol / L, and chloride ion (Cl-) 10 mmol / L.

[0046] Experimental results The high-temperature resistant, environmentally friendly, and energy-saving agents suitable for steam boilers prepared in Examples 1 and 2 were subjected to scale inhibition and corrosion inhibition tests with Comparative Examples 1, 2, and 3 using the method described above. The experimental results are shown in Table 1.

[0047] Table 1

[0048] As can be seen from Table 1, the products of Embodiments 1 and 2 of the present invention are more effective in controlling scaling and corrosion, and the scale inhibition and corrosion resistance effects are very significant.

[0049] On-site dynamic tracking experiment A boiler system in Shanxi Province currently operates two pulverized coal boilers with a rated pressure of 9.8 MPa and rated evaporation capacities of 240 T / H and 410 T / H, respectively. The operating pressure is 9 MPa, and the operating evaporation capacities are 200 T / H and 400 T / H. The requirement is to use boiler energy-saving agents to reduce the blowdown rate to less than 0.5%. This experiment compares the blowdown rate after a period of operation with examples 4, 5, and 6 and commonly used energy-saving agents on the market. The results are shown in Table 2.

[0050] Table 2

[0051] Conclusion: Based on the field usage data in Table 2, the pollution discharge rate of using the present invention in Examples 4, 5, and 6 is <0.5%, while the pollution discharge rate of the selected market energy-saving agent is >1.0%.

[0052] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0053] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers, characterized in that, The raw materials include the following weight percentages: High-temperature polysodium maleate homopolymer: 10-30%; Monoolamines: 5-20%; Diethylhydroxylamine: 5-10%; Morpholine: 1-5%; Acetaldehyde oxime: 5-15%; Acetone oxime: 1-10% Diethylaminoethanol: 10-20% Potassium hydroxide: 1-5% Isothiazolinone: 1-3% Water: Balance.

2. The high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers according to claim 1, characterized in that, The raw materials include the following weight percentages: High-temperature polysodium maleate homopolymer: 25%; Monoolamine: 15%; Diethylhydroxylamine: 8%; Morpholine: 5%; Acetaldehyde oxime: 10% Acetone oxime: 6% Diethylaminoethanol: 18% Potassium hydroxide: 3% Isothiazolinone: 2% Water: Balance.

3. The high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers according to claim 1, characterized in that, The raw materials include the following weight percentages: High-temperature polysodium maleate homopolymer: 20%; Monoolamine: 15%; Diethylhydroxylamine: 10%; Morpholine: 5%; Acetaldehyde oxime: 4% Acetone oxime: 7% Diethylaminoethanol: 16% Potassium hydroxide: 5% Isothiazolinone: 2% Water: Balance.

4. The high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers according to claim 1, characterized in that, The raw materials include the following weight percentages: High-temperature polysodium maleate homopolymer: 25%; Monoolamine: 15%; Diethylhydroxylamine: 10%; Morpholine: 4%; Acetaldehyde oxime: 3% Acetone oxime: 3% Diethylaminoethanol: 10% Potassium hydroxide: 3% Isothiazolinone: 2% Water: Balance.

5. The high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers according to claim 1, characterized in that, The raw materials include the following weight percentages: High-temperature polysodium maleate homopolymer: 25%; Monoolamine: 15%; Diethylhydroxylamine: 15%; Morpholine: 3%; Acetaldehyde oxime: 6% Acetone oxime: 18% Diethylaminoethanol: 12% Potassium hydroxide: 3% Isothiazolinone: 2% Water: Balance.

6. The high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers according to claim 1, characterized in that, The raw materials include the following weight percentages: High-temperature polysodium maleate homopolymer: 20%; Monoolamine: 10%; Diethylhydroxylamine: 15%; Morpholine: 2%; Acetaldehyde oxime: 2% Acetone oxime: 3% Diethylaminoethanol: 1% Potassium hydroxide: 3% Isothiazolinone: 2% Water: Balance.

7. The high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers according to claim 1, characterized in that, The raw materials include the following weight percentages: High-temperature polysodium maleate homopolymer: 20%; Monoolamine: 12%; Diethylhydroxylamine: 19%; Morpholine: 3%; Acetaldehyde oxime: 8% Acetone oxime: 7% Diethylaminoethanol: 13% Potassium hydroxide: 2% Isothiazolinone: 2% Water: Balance.

8. A method for preparing a high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers, characterized in that, Includes the following steps: S1. Under normal temperature and pressure conditions and with stirring, a single alcohol amine, diethylhydroxylamine, morpholine, and acetaldehyde oxime are added in proportion to prepare a raw material mixture; S2. Add acetone oxime, diethylaminoethanol, potassium hydroxide, and isothiazolinone to the raw material mixture obtained in step S1 to obtain a mixed raw material. S3. Stir the mixed raw materials obtained in step S2 for 25 to 35 minutes, and then cool to room temperature to obtain a high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers.

9. The method for preparing a high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers according to claim 8, characterized in that, In step S1, the stirring speed is 100-200 r / min.

10. The method for preparing a high-temperature resistant, environmentally friendly, and energy-saving agent suitable for steam boilers according to claim 8, characterized in that, In step S3, the stirring speed is 200-300 r / min.

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